Adjustable wheeled assembly

Claim 1

AN ADJUSTABLE, WHEELED ASSEMBLY FOR SUPPORTING A PLATFORM OR THE LIKE AND RAISING AND LOWERING SAID PLATFORM TO A DESIRED LEVEL, COMPRISING; HOUSING MEANS ADAPTED TO BE CONNECTED TO THE PLATFORM; A GROUND ENGAGING WHEEL; WHEEL CARRYING MEANS MOUNTING SAID WHEEL AND CONNECTED WITH SAID HOUSING MEANS FOR RELATIVE EXTENSION AND RETRACTION OF SAID HOUSING MEANS UPWARDLY AND DOWNWARDLY TO RAISE AND LOWER SAID PLATFORM FROM ONE LEVEL TO ANOTHER; OPERATING MEANS, REACTING BETWEEN SAID WHEEL CARRYING MEANS AND HOUSING MEANS, OPERATIVE TO RAISE AND LOWER THE HOUSING MEANS AND THE PLATFORM RELATIVE TO THE GROUND ENGAGING WHEEL; A BRAKE SHOE; REACTABLE MEANS CONNECTING TO SAID BRAKE SHOE MEANS AND REACTABLE WITH SAID WHEEL CARRYING MEANS FOR MOVING SAID SHOE MEANS INTO AND OUT OF ENGAGEMENT WITH SAID WHEEL, AND MEANS INCLUDING A ROTATABLE PART CONNECTED WITH SAID REACTABLE MEANS AND SUPPORTED BY SAID OPERATING MEANS RECEIVED BY AND OPERATING WITHIN SAID OPERATING MEANS, OPERABLE INDEPENDENTLY OF SAID OPERATING MEANS FOR MOVING SAID BRAKE SHOE BOTH INTO AND OUT OF POSITIONS OF ENGAGEMENT AND DISENGAGEMENT WITH SAID WHEEL WHEN SAID HOUSING MEANS IS IN VARIOUS POSITIONS OF EXTENSION RELATIVE TO SAID WHEEL AS WELL AS WHEN IT IS IN RETRACTED POSITION.